iOS 1.0 RC 1: battery and heat work, version label, web player redraw tweaks

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

ios/Stemify/UI/Screens/NowPlayingScreen.swift

@@ -521,7 +521,9 @@ struct ProgressVolumeBar: View {
         let dur = pm.durationMs
         let volScale = 0.14 + 0.86 * Double(masterTaper(master)).squareRoot().squareRoot()
         let adjusting = axis == 2
-        TimelineView(.animation(paused: !pm.playWhenReady || scrub != nil)) { _ in
+        // Bars are discrete and the clock shows seconds, so a few redraws a second look the same
+        // as 120. A drag redraws through [scrub] and the volume through [master].
+        TimelineView(.animation(minimumInterval: 0.25, paused: !pm.playWhenReady || scrub != nil)) { _ in
             let pos = scrub.map { Int64($0 * Double(dur)) } ?? pm.positionMs()
             let frac = dur > 0 ? min(max(Double(pos) / Double(dur), 0), 1) : 0
             VStack(spacing: 12) {
@@ -711,7 +713,8 @@ private struct MixerPanel: View {
                         .padding(.vertical, 8)
                     }
                 }
-                TimelineView(.animation(paused: !stems || !pm.playWhenReady)) { _ in
+                // The meters' fall is timed, so 30 fps looks the same and costs a quarter of 120.
+                TimelineView(.animation(minimumInterval: 1 / 30, paused: !stems || !pm.playWhenReady)) { _ in
                     let levels = stems ? meters.step(pm.engine, names.count) : []
                     VStack(spacing: 0) {
                         ForEach(Array(names.enumerated()), id: \.element) { i, name in
@@ -1010,7 +1013,7 @@ struct MiniPlayer: View {
         }
         .overlay(alignment: .bottom) {
             // Thin progress line along the bottom of the card.
-            TimelineView(.animation(minimumInterval: 0.25, paused: !pm.playWhenReady)) { _ in
+            TimelineView(.animation(minimumInterval: 0.5, paused: !pm.playWhenReady)) { _ in
                 let d = pm.durationMs
                 let f = d > 0 ? min(max(Double(pm.positionMs()) / Double(d), 0), 1) : 0
                 GeometryReader { geo in p.accent.frame(width: geo.size.width * f, height: 2) }.frame(height: 2)